JP6702298B2 - Coil sag correction method and coil sag correction device - Google Patents

Description

The present invention relates to a coil sag correction method and a coil sag correction device.

On the outlet side of a hot mill that produces hot-rolled coils, the coils are bundled by bands, but when considering the coil band cutter, which is a post-process, and the operation on the payoff reel in the pickling line, the coil tails It is necessary to always set the end position to a fixed position.

Conventionally, the tail end position of the coil is confirmed by the operator's visual inspection or the visual observation using an ITV (industrial television) monitor to correct the coil sag. There was a problem that it was easy to do.

Therefore, Patent Document 1 proposes a coil sag correction method using a sensor. In the method proposed in Patent Document 1, specifically, the tail end position of the coil is detected using two non-contact distance meters while rotating the coil, and the coil is based on the detected tail end position. The coil droop is corrected by rotating.

JP 61-253117 A

However, in the method proposed in Patent Document 1, it is necessary to rotate the coil to perform scanning in the circumferential direction in order to specify the tail end position, and thus the cycle time for correcting the coil sag becomes long. There is a problem.

The present invention has been made in view of the above, and an object of the present invention is to provide a coil drooping correction method and a coil drooping correction device that can correct coil drooping without lowering production efficiency.

In order to solve the above-mentioned problems and to achieve the object, a coil sag correction method according to the present invention is a detection step of detecting a conveyed coil by a sensor, and the coil is at a position that cannot be detected by the sensor. The transfer step of transferring to a cradle roll after being lifted up to, the installation height of the sensor in the detection step, the lift amount of the coil in the transfer step, and the radius of the coil, based on the coil. A sagging amount calculation step of calculating the sagging amount of the coil, and when the sagging amount of the coil calculated in the sagging amount calculating step exceeds a predetermined threshold value, the coil on the cradle roll depending on the sagging amount of the coil. A tail end position correcting step of rotating the coil to correct the tail end position of the coil.

In the coil drooping correction method according to the present invention, in the above invention, the sagging amount calculation step sets the installation height of the sensor in the detection step to Y, and the coil is not detected by the sensor in the transfer step. When the lift amount of the coil when lifted to a possible position is X and the radius of the outermost circumference of the coil is R, the sagging amount Z of the coil is calculated by Z=XY+R. To do.

Further, the coil dripping correction method according to the present invention is characterized in that, in the above-mentioned invention, the sensor is a sensor for detecting a load.

In order to solve the above-mentioned problems and achieve the object, the coil sag correcting device according to the present invention lifts the sensor that detects the conveyed coil and the coil to a position that cannot be detected by the sensor. After that, a transfer unit that transfers to a cradle roll, the cradle roll configured to rotate the coil transferred by the transfer unit, and a control unit, the control unit, the sensor, Installation height, the amount of lifting of the coil by the transfer unit, based on the radius of the coil, a sagging amount calculation unit that calculates a sagging amount of the coil, and the sag amount calculating unit calculates the sagging amount. When the amount of sagging of the coil exceeds a predetermined threshold value, the tail end position correcting unit that corrects the tail end position of the coil by rotating the coil on the cradle roll according to the amount of sagging of the coil. It is characterized by having.

According to the present invention, the amount of coil dripping can be calculated during the conveyance of the coil and the tail end position of the coil can be corrected, so that the coil dripping can be corrected without lowering the production efficiency.

FIG. 1 is a diagram showing a configuration of a coil sag correcting device according to an embodiment of the present invention. FIG. 2 is a diagram for explaining an example of the installation position of the sensor in the coil sag correcting device according to the embodiment of the present invention. FIG. 3 is a flowchart showing a flow of a coil drooping correction method using the coil drooping correction device according to the embodiment of the present invention.

Hereinafter, a coil sag correction method and a coil sag correction device according to an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments below.

[Coil sag correction device]
Hereinafter, the configuration of the coil sag correcting device 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. The coil dripping correction device 1 is applied to the transfer equipment 10 for the coil Co shown in FIG. 1, and includes sensors 31, 32, a transfer section 40, a cradle roll 50, and a control section 60. ing. Among these configurations, the sensors 31, 32, the transfer section 40, and the cradle roll 50 are provided in the transfer equipment 10 for the coil Co.

The sensors 31 and 32 are sensors originally provided in the transfer equipment 10 for detecting a load. Each of the sensors 31 and 32 includes a transmitter and a receiver, and a photoelectric sensor or the like can be used, for example.

As shown in FIG. 1, the sensors 31 and 32 are arranged at predetermined installation heights Y with reference to the upper surface of the carriage 20. Further, as shown in FIG. 2, the coil Co transported by the transport carriage 20 generally has a fishtail-shaped end portion, and the center in the width direction is bound by a band Ba. .. In this case, the sensors 31 and 32 collide with a position where the tail end Co2 of the coil Co can be detected in the width direction of the coil Co, for example, a straight line extending downward from the tail end Co2 of the coil Co (see a broken line in FIG. 2). It is arranged at the position A or the position B.

As shown in FIG. 1, the sensors 31 and 32 have a detection range (one point in FIG. 1) on a straight line connecting the sensor 31 and the sensor 32 when the coil Co is transported by the transport vehicle 20 into the transfer equipment 10. The coil Co in the chain line) is detected. That is, the sensors 31, 32 are turned on when the coil Co is in the detection range of the sensors 31, 32, and when the coil Co (including the sagging portion Co1 described later) is out of the detection range of the sensors 31, 32. The sensor is turned off. Then, the sensors 31 and 32 output these sensor ON signal and sensor OFF signal to the control unit 60.

In addition, the carrier 20 is for carrying a coil Co made by a winder (not shown), moving it, and carrying it to the transfer equipment 10. In addition, as shown in FIG. 1, the coil Co is transported into the transfer equipment 10 by the transport vehicle 20 at the down end, that is, in the state where the winding axis direction is horizontal.

The transfer unit 40 transfers the coil Co on the carrier 20 to the cradle roll 50, and includes a tongue 41, a hoisting motor 42, and a traverse motor (not shown). Specifically, the transfer unit 40 grips the coil Co on the carrier vehicle 20 with the tongs 41, lifts the coil Co to a position that cannot be detected by the sensors 31 and 32 by the hoisting motor 42, and then, is illustrated. The coil Co is placed on the rolls 51 and 52 of the cradle roll 50 by a traverse motor that does not.

The cradle roll 50 is a pedestal for the coil Co and includes two rotating rolls 51 and 52. As a result, the cradle roll 50 is configured to be able to rotate the coil Co transferred by the transfer unit 40.

The control unit 60 is realized by, for example, a CPU, and includes a sagging amount calculation unit 61, a determination unit 62, and a tail end position correction unit 63. The details of the sagging amount calculation unit 61, the determination unit 62, and the tail end position correction unit 63 will be described later.

A sensor ON signal and a sensor OFF signal are input to the control unit 60 from the sensors 31 and 32. Further, the hoisting motor 42 inputs the hoisting amount of the coil Co, that is, the lifting amount X of the coil Co by the tongue 41 to the control unit 60. The control unit 60 also controls the rotation of the hoisting motor 42, a traverse motor (not shown), and the cradle roll 50.

[Coil sag correction method]
Hereinafter, a coil sag correction method using the coil sag correction device 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 3, the coil sag correction method according to the present embodiment includes a detection step (step S1), a transfer step (step S2), a sagging amount calculation step (step S3), and a determination step (step S4). ) And the tail end position correction step (step S5) are performed in this order.

In the detection step, the coils 31 that have been transported down-end by the transport vehicle 20 are detected by the sensors 31 and 32 (step S1). When detecting the coil Co conveyed between the sensors 31 and 32, the sensors 31 and 32 output a sensor ON signal to the control unit 60.

Subsequently, in the transfer process, the coil Co is lifted to a position where it cannot be detected by the sensors 31 and 32, and then transferred to the rolls 51 and 52 of the cradle roll 50 (step S2). It should be noted that, as shown in FIG. 1, the “position that cannot be detected by the sensors 31 and 32” means that the tail end Co2 of the sagging portion Co1 of the coil Co connects the sensor 31 and the sensor 32 (a chain line in the same figure). (See reference) indicates a position outside the detection range. The sensors 31, 32 output a sensor OFF signal to the control unit 60 when the coil Co moves out of the detection range. Further, the hoisting motor 42 outputs the lifting amount X of the coil Co in the transfer process to the control unit 60.

Subsequently, in the sagging amount calculating step, the sagging amount calculating section 61 causes the coil Co based on the installation height of the sensors 31 and 32 in the detecting step, the lifting amount of the coil Co in the transferring step, and the radius of the coil Co. (Hereinafter, referred to as “coil sag amount”) is calculated (step S3).

Specifically, as shown in FIGS. 1 and 2, the sagging amount calculation unit 61 sets the installation height of the sensors 31, 32 in the detection process to Y, and detects the coil Co by the sensors 31, 32 in the transfer process. When the lift amount of the coil Co when lifted to an impossible position is X, and the radius of the outermost circumference of the coil Co is R, the coil dripping amount Z is calculated by "Z=XY-R". The installation height Y of the sensors 31 and 32 and the radius R of the outermost circumference of the coil Co are set values or values known in advance.

In the determination step, the determination unit 62 determines whether or not the coil sag amount Z calculated in the sagging amount calculation step exceeds a predetermined threshold value (step S4), and if the determination is affirmative (Yes in step S4), the step is performed. The process proceeds to the tail end position correcting step of S5, and if the determination is negative (No in step S4), the process ends.

In the tail end position correcting step, the tail end position correcting unit 63 rotates the coil Co on the rolls 51 and 52 of the cradle roll 50 counterclockwise according to the coil dripping amount Z, and adjusts the tail end position of the coil Co. It is corrected (step S5). The coil sag is corrected by the above procedure.

In the tail end position correcting step, for example, the tail end position of the coil Co is corrected so that the tail end Co2 of the hanging portion Co1 of the coil Co is at least the position of P1 in FIG. Further, in the tail end position correcting step, it is preferable to correct the tail end position of the coil Co so that the tail end Co2 of the hanging portion Co1 becomes the position P2 in FIG. By moving the tail end Co2 of the coil Co to the position of P2, the tail end Co2 can be pressed by the roll 51 of the cradle roll 50, so that subsequent coil drooping can be reliably prevented.

As described above, according to the coil drooping correction method using the coil drooping correction device 1 according to the present embodiment, the coil drooping amount Z is calculated during the conveyance of the coil Co, and the tail end position of the coil Co is corrected. Therefore, it is possible to correct the coil sag without lowering the production efficiency.

Further, the method proposed in Patent Document 1 described above has a problem that the cost becomes high because it is necessary to use two expensive non-contact distance meters. On the other hand, in the coil dripping correction method according to the present embodiment, since the sensors 31 and 32 for originally detecting the load, which are originally provided in the transfer equipment 10, are used, the coil dripping can be corrected at low cost.

As described above, the coil sag correcting method and the coil sag correcting device according to the present invention have been specifically described with reference to the embodiments for carrying out the invention, but the gist of the present invention is not limited to these descriptions. It should be broadly construed based on the statement of the range of. It goes without saying that various changes and modifications based on these descriptions are also included in the spirit of the present invention.

For example, in the coil sag correcting device 1 described above, the sensors for detecting the presence of goods, such as the photoelectric sensor, are given as an example of the sensors 31 and 32, but an image pickup device or the like may be used instead of the sensors for detecting the presence of goods.

In addition, in the above-described coil sag correcting device 1, with respect to the coil Co, an example in which the end shape of the coil Co is a fishtail shape and the center in the width direction is bound by the band Ba is illustrated (FIG. 2)), the coil sag correcting device 1 according to the present invention is naturally applicable even when the end shape of the coil Co is not a fishtail shape or when the center in the width direction is not bound by the band Ba.

DESCRIPTION OF SYMBOLS 1 Coil sag correction device 10 Transfer equipment 20 Conveyor cart 31, 32 Sensor 40 Transfer part 41 Tong 42 Hoisting motor 50 Cradle roll 51, 52 Roll 60 Control part 61 Sagging amount calculation part 62 Judgment part 63 Tail position correction part Ba band Co Coil Co1 Sagging part Co2 Tail end

Claims (4)

A detection step of detecting the conveyed coil by a sensor,
After the coil is lifted to a position where it cannot be detected by the sensor, a transfer step of transferring it to a cradle roll,
An installation height of the sensor in the detection step, a lift amount of the coil in the transfer step, and a sagging amount calculation step of calculating a sagging amount of the coil based on a radius of the coil,
When the amount of sag of the coil calculated in the sagging amount calculation step exceeds a predetermined threshold value, the coil on the cradle roll is rotated according to the amount of sag of the coil, and the tail end position of the coil is adjusted. A tail end position correction process for correction,
Only including,
The sensor is arranged in a direction capable of detecting the main body and the hanging portion of the coil,
The coil hanging correction method , wherein the installation height of the sensor is smaller than the lifting amount of the coil. In the sagging amount calculation step, the installation height of the sensor in the detection step is Y, and the lifting amount of the coil when the coil is lifted to a position that cannot be detected by the sensor in the transfer step is X. The coil drooping correction method according to claim 1, wherein when the radius of the outermost circumference of the coil is R, the drooping amount Z of the coil is calculated by Z=XY+R. The coil sag correction method according to claim 1 or 2, wherein the sensor is a sensor for detecting a load. A sensor that detects the conveyed coil,
A transfer unit that transfers the coil to a cradle roll after lifting the coil to a position that cannot be detected by the sensor,
The cradle roll configured to rotate the coil transferred by the transfer unit,
A control unit,
Equipped with
The control unit is
An installation height of the sensor, a lift amount of the coil by the transfer unit, and a dripping amount calculation unit that calculates a dripping amount of the coil based on a radius of the coil,
When the amount of sag of the coil calculated by the sagging amount calculation unit exceeds a predetermined threshold value, the coil on the cradle roll is rotated according to the amount of sag of the coil, and the tail end position of the coil is adjusted. A tail end position correction unit to correct,
Have a,
The sensor is arranged in a direction capable of detecting the main body and the hanging portion of the coil,
The installation height of the sensor is smaller than the lifting amount of the coil.

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